Valve.



No. 773,209. PATENTED OCT. 25, 1904.

J.-L; LATTA & J. A. MARTIN. VALVE.

APPLICATION FILED MAY 25, 1904.

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' J. L. LATTA & J. A. MARTIN.

VALVE.

APPLICATION FILED MAY 25, 1904.

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j I I I I o Attorneys Witnesses NITED STATES Patented October 25, 1904.

PATENT OFFICE.

JOHN LEE LATTA AND JAMES ANDREW MARTIN, OF HICKORY, NORTH CAROLINA.

VALVE.

SPECIFICATION forming part of Letters Patent No. 773,209, dated October25, 1904.

Application filed May 25, 1904.

To all whom it may concern:

Be it known that we, JOHN LEE LATTA and J AMEs ANDREW MARTIN, citizensof the United States, residing at Hickory, in the county of Catawba andState of North Carolina, have invented a new and useful Valve, of whichthe following is a specification.

This invention relates to improvements in valves for compressed-airwater-elevators of that general type in which air under pressure isforced alternately into a pair of cylinders or tanks for the purpose ofexpelling water therefrom.

The principal object of the invention is to provide a novel form ofair-controlling valve of simple and economical construction and by whichthe flow of air will be under complete control.

A further object of the invention is to provide a device of thischaracter in which a pair of valve members are arranged within a commoncasing and held to their seats by the pressure of air in a small spaceformed between the two members, said air-space serving also as a port orpassage for the air employed in moving the main air-valve of theapparatus.

WVith these and other objects in view, as will more fully hereinafterappear, the invention consists in the novel construction and arrangementof parts hereinafter fully described,illustrated in the accompanyingdrawings, and particularly pointed out in the appended claims, it beingunderstood that various changes in the form, proportions, size, andminor details of the structure may be made without departing from thespirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is an elevation of acompressed-air water-elevator provided with a valve constructed inaccordance with the invention, portions of the casing of the devicebeing broken away in order to more clearly illustrate the construction.Fig. 2 is a central sectional elevation of the valve and valve-casing.Fig. 3 is a transverse sectional elevation of the same on the line 3 3of Fig. 2. Fig. 4 is a detail plan view of the main valve-seat. Figs. 5and 6 Serial No. 209,793. (No model.)

are detail perspective views of the members of the auxiliary valvedetached.

Similar numerals of reference are employed to indicate correspondingparts throughout the several figures of the drawings.

The device forming the subject of the present invention is designed moreespecially for use in connection with water pumping or elevatingdevices, wherein compressed air acts actuating mechanism, a portion ofwhich is connected to buckets 8, arranged within each chamber andserving when the water is discharged to act through rods 9 androckerarms 10 to effect initial movement of the valveoperatingmechanism.

The valve and its operating mechanism are arranged within atwo-partcasing 11 12, having suitable bolting-flanges to formfluid-proof joints. The upper surface of the section 12 is faced oif toform a seat for a slide-valve 13, which controls the flow of air to thewatercontaining chambers 1 and 2. Leading to the valve-seat are threeports 14, 15, and 16, the port 14 being in communication with thewater-chamber 1, the port 15 in communication with the water-chamber 2,and the central port 16 communicating with the open air or with asuitable pipe through which the exhaust-air is discharged. The valve 13is of the ordinary D type and operates alternately to place the ports 14and 15 in communication with the exhaust, one of the chambersexhaustingwhile the other receives air under pressure from the mainsection 11. The upper section 11 is bored out at its opposite ends toform a pair of axial alining cylinders 17 and 18, in which are arrangedpistons 19 and 20, respectively, said pistons being rigidly securedtogether by a stem 21, which also extends through a slot 22, formed inthe upper face of valve 13. Each of the pistons is provided with aninwardly-projecting hub member for engaging against the end of the valvein order to prevent lost motion. The compressed air enters through theport 23, so that the opposing faces of the two pistons are constantlysubjected to pressure, and being of equal area will not be moved ineither direction under the influence of such pressure.

The lower portion of the casing is in the form of a box 24:, that isbolted between the upper ends of the two water-chambers, and this box isdivided transversely into two chambers 25 and 26 by the lowervalve-casing 27, the valve-casing being preferably formed of brass andits ends being faced off in order that it may be connected to thewater-eylinder ends and a tight joint formed, so that there will be nodanger of the leakage of air from one chamber into the other. The casing27 is made in two sections 28 and 29, that are united by bolts 30, andthe opposite side walls of the casing are provided with openings for thepassage of valvestems 31 32, to which are secured disk-valves 33 and 31, respectively, these valves being slightly spaced from each other andair being introduced between them through port 35, leading directly fromthe main chest, so that said valves will at all times be held to theirseats. The opposing faces of the two valves are grooved for thereception of a key 36, by which the valve members are connected formutual rocking movement; but the connection is sufficiently loose topermit the valves to separate under the pressure of air entering throughport 35. The stem 31 of of valve 33 is secured at a point outside thevalve-casing to a rocker-arm 37, that is connected to one of the arms10, and in similar manner the stem 32 of valve 34: is connected to arocker-arm 38, the arms being alternately raised and lowered as thedevice operates.

In the section 28 of the valve-casing is formed a port 40, whichcommunicates with a similar port leading to the rear end of the cylinder17, and in the valve member 34: is a port 15, which when the arm 38 israised will be brought into alinement with the port 40, as indicated inFig. 2, and air under pressure will pass from the space between the twovalves through the port 45, thence through port 10 to the rear of thepiston 17, and will move the piston 19 in such manner as to open port 15to the main air-chest and establish communication between the port 14and the escapeport 16 by way of the D-valve 13. This permits air to flowthrough the port 15 into chamber 5 and from thence to pass towaterchamber 2 and expel the water therefrom. During this operation theair previously admitted to the chai'nber 1 passes through the chamber 25and port 1a to the escape-port 16, allowing water to enter the chamber1, the operation continuing until sufficient water has been expelledfrom the chamber 2 to allow the bucket 8 to descend and gradually movethe arm 38 to the lowest position. When this is done, an arcuate port 17in the valve member 34 is moved to place the port 10 in communicationwith an exhaust-port 14C, and air will be exhausted from the cylinder 17through the ports 40, 4A, and 4.8 to the outer air. At the same timeupward movement of the arm 37, which is simultaneous with the downwardmovement of arm 38, will move port 11 of the valve 33 into alinementwith a port 46, leading upward from the valve-casing to the outer end ofthe cylinder 18, and as the air exhausts from cylinder 17 air underpressure will enter cylinder 18 and cause movement of the valve 13 inthe opposite direction, opening communication between the main air-chestand port 14. Air under pressure then passes through chamber 25 to thewater-containing chamber 1 and expels the water therefrom. At the sametime port 15 is placed in communication with port 16 and the air ofchamber 2 passes through chamber 26, port 15, valve 13, and thencethrough escape-port 16. During the time water is being expelled from thechamber 1 the arm 37 descends, while arm 38 is elevated. This brings theport 4:3 in the valve 33 into alinement with the port 46 and theescapeport 4A, leading to the main escape-port 48, so that the airpreviously admitted to the cylinder 18 is allowed to escape. Thisoperation is continued so long as there is sufficient water to flow intothe chambers and the air-supply is maintained.

Having thus described the invention, What is claimed is 1. Thecombination with a main air-valve of a secondary controlling-valveincluding a pair of members each having ports for controlling the iiowof air to and from the main valve-operating devices, a ported casingcontaining said secondary valve, and an air-port leading to the casingat a point between the two valve members and serving to supply airbetween the members to hold them to their seats and to operate the mainvalve-actuating devices.

2. The combination with a ported casing, of a pair of ported disksarranged within the casing and connected for mutual oscillatorymovement, said members being free to separate laterally and being heldto their respective seats by the pressure of air introduced betweenthem.

3. The combination with a ported valvecasing, of a valve formed of apair of ported disks held. away from each other and against theirrespective seats by pressure of air introduced between them, theadjacent faces of said members being slotted, and a locking-key enteringthe slots and connecting the members to each other for mutualoscillatory movement.

4. The combination with a ported valvecasing, of a pair of disks formingindependent valve members and maintained in spaced relation byfluid-pressure, means for connecting the disks for mutual oscillatorymovement, and means for oscillating said disks.

5. The combination With a ported valvecasing, of a pair of ported disks,an air-port leading into the valve-casing and serving for the admittanceof air thereby to maintain the disks in spaced relation, a keyconnecting the disks for mutual oscillatory movement, and means foroscillating said disks.

In testimony that We claim the foregoing as our own We have heretoaffixed our signatures in the presence of two Witnesses.

Witnessesr W. N. MARTIN, C. M. SHERRILL.

